Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2017-10-04
*/

pragma solidity ^0.4.11;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}
/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 {
  uint256 _totalSupply;
  function totalSupply() constant returns (uint256 totalSupply);
  function balanceOf(address _owner) constant returns (uint balance);
  function transfer(address _to, uint _value) returns (bool success);
  function transferFrom(address _from, address _to, uint _value) returns (bool success);
  function approve(address _spender, uint _value) returns (bool success);
  function allowance(address _owner, address _spender) constant returns (uint remaining);
  event Transfer(address indexed _from, address indexed _to, uint _value);
  event Approval(address indexed _owner, address indexed _spender, uint _value);
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20 {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  // Owner of account approves the transfer of an amount to another account
  mapping(address => mapping (address => uint256)) allowed;

  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) returns (bool success) {
    if (balances[msg.sender] >= _value
    && _value > 0
    && balances[_to] + _value > balances[_to]) {
      balances[msg.sender] -= _value;
      balances[_to] += _value;
      Transfer(msg.sender, _to, _value);
      return true;
    } else {
      return false;
    }
  }

  // Send _value amount of tokens from address _from to address _to
  // The transferFrom method is used for a withdraw workflow, allowing contracts to send
  // tokens on your behalf, for example to "deposit" to a contract address and/or to charge
  // fees in sub-currencies; the command should fail unless the _from account has
  // deliberately authorized the sender of the message via some mechanism; we propose
  // these standardized APIs for approval:
  function transferFrom(address _from,address _to, uint256 _amount) returns (bool success) {
    if (balances[_from] >= _amount
    && allowed[_from][msg.sender] >= _amount
    && _amount > 0
    && balances[_to] + _amount > balances[_to]) {
      balances[_from] -= _amount;
      allowed[_from][msg.sender] -= _amount;
      balances[_to] += _amount;
      return true;
    } else {
      return false;
    }
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) constant returns (uint256 balance) {
    return balances[_owner];
  }

  function totalSupply() constant returns (uint256 totalSupply) {
    totalSupply = _totalSupply;
  }

}


/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amout of tokens to be transfered
   */
  function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

    balances[_to] = balances[_to].add(_value);
    balances[_from] = balances[_from].sub(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) returns (bool success) {
    allowed[msg.sender][_spender] = _value;
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifing the amount of tokens still avaible for the spender.
   */
  function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }

}

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() {
    owner = msg.sender;
  }


  /**
   * @dev Throws if called by any account other than the owner.
   */
  // Functions with this modifier can only be executed by the owner

  modifier onlyOwner() {
    if (msg.sender != owner) {
      revert();
    }
    _;
  }


  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) onlyOwner {
    if (newOwner != address(0)) {
      owner = newOwner;
    }
  }

}



/**
 * @title Mintable token
 * @dev Simple ERC20 Token example, with mintable token creation
 * @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
 * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
 */

contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  /**
   * @dev Function to mint tokens
   * @param _to The address that will recieve the minted tokens.
   * @param _amount The amount of tokens to mint.
   * @return A boolean that indicates if the operation was successful.
   */
  function mint(address _to, uint256 _amount) onlyOwner canMint returns (bool) {
    _totalSupply = _totalSupply.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    Mint(_to, _amount);
    return true;
  }

  /**
   * @dev Function to stop minting new tokens.
   * @return True if the operation was successful.
   */
  function finishMinting() onlyOwner returns (bool) {
    mintingFinished = true;
    MintFinished();
    return true;
  }
}

contract NatCoin is MintableToken {
  string public constant name = "NATCOIN";
  string public constant symbol = "NTC";
  uint256 public constant decimals = 18;
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[],"name":"mintingFinished","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"totalSupply","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"mint","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"finishMinting","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"amount","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[],"name":"MintFinished","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]

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

bzzr://3de204ea5eb943ffceed674dba40e5aa3a1d583f22d1cee0bf338663c3b7202d